811 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6#include "xfs.h"7#include "xfs_fs.h"8#include "xfs_shared.h"9#include "xfs_format.h"10#include "xfs_log_format.h"11#include "xfs_trans_resv.h"12#include "xfs_mount.h"13#include "xfs_trans.h"14#include "xfs_buf_item.h"15#include "xfs_trans_priv.h"16#include "xfs_trace.h"17 18/*19 * Check to see if a buffer matching the given parameters is already20 * a part of the given transaction.21 */22STATIC struct xfs_buf *23xfs_trans_buf_item_match(24 struct xfs_trans *tp,25 struct xfs_buftarg *target,26 struct xfs_buf_map *map,27 int nmaps)28{29 struct xfs_log_item *lip;30 struct xfs_buf_log_item *blip;31 int len = 0;32 int i;33 34 for (i = 0; i < nmaps; i++)35 len += map[i].bm_len;36 37 list_for_each_entry(lip, &tp->t_items, li_trans) {38 blip = (struct xfs_buf_log_item *)lip;39 if (blip->bli_item.li_type == XFS_LI_BUF &&40 blip->bli_buf->b_target == target &&41 xfs_buf_daddr(blip->bli_buf) == map[0].bm_bn &&42 blip->bli_buf->b_length == len) {43 ASSERT(blip->bli_buf->b_map_count == nmaps);44 return blip->bli_buf;45 }46 }47 48 return NULL;49}50 51/*52 * Add the locked buffer to the transaction.53 *54 * The buffer must be locked, and it cannot be associated with any55 * transaction.56 *57 * If the buffer does not yet have a buf log item associated with it,58 * then allocate one for it. Then add the buf item to the transaction.59 */60STATIC void61_xfs_trans_bjoin(62 struct xfs_trans *tp,63 struct xfs_buf *bp,64 int reset_recur)65{66 struct xfs_buf_log_item *bip;67 68 ASSERT(bp->b_transp == NULL);69 70 /*71 * The xfs_buf_log_item pointer is stored in b_log_item. If72 * it doesn't have one yet, then allocate one and initialize it.73 * The checks to see if one is there are in xfs_buf_item_init().74 */75 xfs_buf_item_init(bp, tp->t_mountp);76 bip = bp->b_log_item;77 ASSERT(!(bip->bli_flags & XFS_BLI_STALE));78 ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));79 ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));80 if (reset_recur)81 bip->bli_recur = 0;82 83 /*84 * Take a reference for this transaction on the buf item.85 */86 atomic_inc(&bip->bli_refcount);87 88 /*89 * Attach the item to the transaction so we can find it in90 * xfs_trans_get_buf() and friends.91 */92 xfs_trans_add_item(tp, &bip->bli_item);93 bp->b_transp = tp;94 95}96 97void98xfs_trans_bjoin(99 struct xfs_trans *tp,100 struct xfs_buf *bp)101{102 _xfs_trans_bjoin(tp, bp, 0);103 trace_xfs_trans_bjoin(bp->b_log_item);104}105 106/*107 * Get and lock the buffer for the caller if it is not already108 * locked within the given transaction. If it is already locked109 * within the transaction, just increment its lock recursion count110 * and return a pointer to it.111 *112 * If the transaction pointer is NULL, make this just a normal113 * get_buf() call.114 */115int116xfs_trans_get_buf_map(117 struct xfs_trans *tp,118 struct xfs_buftarg *target,119 struct xfs_buf_map *map,120 int nmaps,121 xfs_buf_flags_t flags,122 struct xfs_buf **bpp)123{124 struct xfs_buf *bp;125 struct xfs_buf_log_item *bip;126 int error;127 128 *bpp = NULL;129 if (!tp)130 return xfs_buf_get_map(target, map, nmaps, flags, bpp);131 132 /*133 * If we find the buffer in the cache with this transaction134 * pointer in its b_fsprivate2 field, then we know we already135 * have it locked. In this case we just increment the lock136 * recursion count and return the buffer to the caller.137 */138 bp = xfs_trans_buf_item_match(tp, target, map, nmaps);139 if (bp != NULL) {140 ASSERT(xfs_buf_islocked(bp));141 if (xfs_is_shutdown(tp->t_mountp)) {142 xfs_buf_stale(bp);143 bp->b_flags |= XBF_DONE;144 }145 146 ASSERT(bp->b_transp == tp);147 bip = bp->b_log_item;148 ASSERT(bip != NULL);149 ASSERT(atomic_read(&bip->bli_refcount) > 0);150 bip->bli_recur++;151 trace_xfs_trans_get_buf_recur(bip);152 *bpp = bp;153 return 0;154 }155 156 error = xfs_buf_get_map(target, map, nmaps, flags, &bp);157 if (error)158 return error;159 160 ASSERT(!bp->b_error);161 162 _xfs_trans_bjoin(tp, bp, 1);163 trace_xfs_trans_get_buf(bp->b_log_item);164 *bpp = bp;165 return 0;166}167 168/*169 * Get and lock the superblock buffer for the given transaction.170 */171struct xfs_buf *172xfs_trans_getsb(173 struct xfs_trans *tp)174{175 struct xfs_buf *bp = tp->t_mountp->m_sb_bp;176 177 /*178 * Just increment the lock recursion count if the buffer is already179 * attached to this transaction.180 */181 if (bp->b_transp == tp) {182 struct xfs_buf_log_item *bip = bp->b_log_item;183 184 ASSERT(bip != NULL);185 ASSERT(atomic_read(&bip->bli_refcount) > 0);186 bip->bli_recur++;187 188 trace_xfs_trans_getsb_recur(bip);189 } else {190 xfs_buf_lock(bp);191 xfs_buf_hold(bp);192 _xfs_trans_bjoin(tp, bp, 1);193 194 trace_xfs_trans_getsb(bp->b_log_item);195 }196 197 return bp;198}199 200/*201 * Get and lock the buffer for the caller if it is not already202 * locked within the given transaction. If it has not yet been203 * read in, read it from disk. If it is already locked204 * within the transaction and already read in, just increment its205 * lock recursion count and return a pointer to it.206 *207 * If the transaction pointer is NULL, make this just a normal208 * read_buf() call.209 */210int211xfs_trans_read_buf_map(212 struct xfs_mount *mp,213 struct xfs_trans *tp,214 struct xfs_buftarg *target,215 struct xfs_buf_map *map,216 int nmaps,217 xfs_buf_flags_t flags,218 struct xfs_buf **bpp,219 const struct xfs_buf_ops *ops)220{221 struct xfs_buf *bp = NULL;222 struct xfs_buf_log_item *bip;223 int error;224 225 *bpp = NULL;226 /*227 * If we find the buffer in the cache with this transaction228 * pointer in its b_fsprivate2 field, then we know we already229 * have it locked. If it is already read in we just increment230 * the lock recursion count and return the buffer to the caller.231 * If the buffer is not yet read in, then we read it in, increment232 * the lock recursion count, and return it to the caller.233 */234 if (tp)235 bp = xfs_trans_buf_item_match(tp, target, map, nmaps);236 if (bp) {237 ASSERT(xfs_buf_islocked(bp));238 ASSERT(bp->b_transp == tp);239 ASSERT(bp->b_log_item != NULL);240 ASSERT(!bp->b_error);241 ASSERT(bp->b_flags & XBF_DONE);242 243 /*244 * We never locked this buf ourselves, so we shouldn't245 * brelse it either. Just get out.246 */247 if (xfs_is_shutdown(mp)) {248 trace_xfs_trans_read_buf_shut(bp, _RET_IP_);249 return -EIO;250 }251 252 /*253 * Check if the caller is trying to read a buffer that is254 * already attached to the transaction yet has no buffer ops255 * assigned. Ops are usually attached when the buffer is256 * attached to the transaction, or by the read caller if257 * special circumstances. That didn't happen, which is not258 * how this is supposed to go.259 *260 * If the buffer passes verification we'll let this go, but if261 * not we have to shut down. Let the transaction cleanup code262 * release this buffer when it kills the tranaction.263 */264 ASSERT(bp->b_ops != NULL);265 error = xfs_buf_reverify(bp, ops);266 if (error) {267 xfs_buf_ioerror_alert(bp, __return_address);268 269 if (tp->t_flags & XFS_TRANS_DIRTY)270 xfs_force_shutdown(tp->t_mountp,271 SHUTDOWN_META_IO_ERROR);272 273 /* bad CRC means corrupted metadata */274 if (error == -EFSBADCRC)275 error = -EFSCORRUPTED;276 return error;277 }278 279 bip = bp->b_log_item;280 bip->bli_recur++;281 282 ASSERT(atomic_read(&bip->bli_refcount) > 0);283 trace_xfs_trans_read_buf_recur(bip);284 ASSERT(bp->b_ops != NULL || ops == NULL);285 *bpp = bp;286 return 0;287 }288 289 error = xfs_buf_read_map(target, map, nmaps, flags, &bp, ops,290 __return_address);291 switch (error) {292 case 0:293 break;294 default:295 if (tp && (tp->t_flags & XFS_TRANS_DIRTY))296 xfs_force_shutdown(tp->t_mountp, SHUTDOWN_META_IO_ERROR);297 fallthrough;298 case -ENOMEM:299 case -EAGAIN:300 return error;301 }302 303 if (xfs_is_shutdown(mp)) {304 xfs_buf_relse(bp);305 trace_xfs_trans_read_buf_shut(bp, _RET_IP_);306 return -EIO;307 }308 309 if (tp) {310 _xfs_trans_bjoin(tp, bp, 1);311 trace_xfs_trans_read_buf(bp->b_log_item);312 }313 ASSERT(bp->b_ops != NULL || ops == NULL);314 *bpp = bp;315 return 0;316 317}318 319/* Has this buffer been dirtied by anyone? */320bool321xfs_trans_buf_is_dirty(322 struct xfs_buf *bp)323{324 struct xfs_buf_log_item *bip = bp->b_log_item;325 326 if (!bip)327 return false;328 ASSERT(bip->bli_item.li_type == XFS_LI_BUF);329 return test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);330}331 332/*333 * Release a buffer previously joined to the transaction. If the buffer is334 * modified within this transaction, decrement the recursion count but do not335 * release the buffer even if the count goes to 0. If the buffer is not modified336 * within the transaction, decrement the recursion count and release the buffer337 * if the recursion count goes to 0.338 *339 * If the buffer is to be released and it was not already dirty before this340 * transaction began, then also free the buf_log_item associated with it.341 *342 * If the transaction pointer is NULL, this is a normal xfs_buf_relse() call.343 */344void345xfs_trans_brelse(346 struct xfs_trans *tp,347 struct xfs_buf *bp)348{349 struct xfs_buf_log_item *bip = bp->b_log_item;350 351 ASSERT(bp->b_transp == tp);352 353 if (!tp) {354 xfs_buf_relse(bp);355 return;356 }357 358 trace_xfs_trans_brelse(bip);359 ASSERT(bip->bli_item.li_type == XFS_LI_BUF);360 ASSERT(atomic_read(&bip->bli_refcount) > 0);361 362 /*363 * If the release is for a recursive lookup, then decrement the count364 * and return.365 */366 if (bip->bli_recur > 0) {367 bip->bli_recur--;368 return;369 }370 371 /*372 * If the buffer is invalidated or dirty in this transaction, we can't373 * release it until we commit.374 */375 if (test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags))376 return;377 if (bip->bli_flags & XFS_BLI_STALE)378 return;379 380 /*381 * Unlink the log item from the transaction and clear the hold flag, if382 * set. We wouldn't want the next user of the buffer to get confused.383 */384 ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));385 xfs_trans_del_item(&bip->bli_item);386 bip->bli_flags &= ~XFS_BLI_HOLD;387 388 /* drop the reference to the bli */389 xfs_buf_item_put(bip);390 391 bp->b_transp = NULL;392 xfs_buf_relse(bp);393}394 395/*396 * Forcibly detach a buffer previously joined to the transaction. The caller397 * will retain its locked reference to the buffer after this function returns.398 * The buffer must be completely clean and must not be held to the transaction.399 */400void401xfs_trans_bdetach(402 struct xfs_trans *tp,403 struct xfs_buf *bp)404{405 struct xfs_buf_log_item *bip = bp->b_log_item;406 407 ASSERT(tp != NULL);408 ASSERT(bp->b_transp == tp);409 ASSERT(bip->bli_item.li_type == XFS_LI_BUF);410 ASSERT(atomic_read(&bip->bli_refcount) > 0);411 412 trace_xfs_trans_bdetach(bip);413 414 /*415 * Erase all recursion count, since we're removing this buffer from the416 * transaction.417 */418 bip->bli_recur = 0;419 420 /*421 * The buffer must be completely clean. Specifically, it had better422 * not be dirty, stale, logged, ordered, or held to the transaction.423 */424 ASSERT(!test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags));425 ASSERT(!(bip->bli_flags & XFS_BLI_DIRTY));426 ASSERT(!(bip->bli_flags & XFS_BLI_HOLD));427 ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));428 ASSERT(!(bip->bli_flags & XFS_BLI_ORDERED));429 ASSERT(!(bip->bli_flags & XFS_BLI_STALE));430 431 /* Unlink the log item from the transaction and drop the log item. */432 xfs_trans_del_item(&bip->bli_item);433 xfs_buf_item_put(bip);434 bp->b_transp = NULL;435}436 437/*438 * Mark the buffer as not needing to be unlocked when the buf item's439 * iop_committing() routine is called. The buffer must already be locked440 * and associated with the given transaction.441 */442/* ARGSUSED */443void444xfs_trans_bhold(445 xfs_trans_t *tp,446 struct xfs_buf *bp)447{448 struct xfs_buf_log_item *bip = bp->b_log_item;449 450 ASSERT(bp->b_transp == tp);451 ASSERT(bip != NULL);452 ASSERT(!(bip->bli_flags & XFS_BLI_STALE));453 ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));454 ASSERT(atomic_read(&bip->bli_refcount) > 0);455 456 bip->bli_flags |= XFS_BLI_HOLD;457 trace_xfs_trans_bhold(bip);458}459 460/*461 * Cancel the previous buffer hold request made on this buffer462 * for this transaction.463 */464void465xfs_trans_bhold_release(466 xfs_trans_t *tp,467 struct xfs_buf *bp)468{469 struct xfs_buf_log_item *bip = bp->b_log_item;470 471 ASSERT(bp->b_transp == tp);472 ASSERT(bip != NULL);473 ASSERT(!(bip->bli_flags & XFS_BLI_STALE));474 ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));475 ASSERT(atomic_read(&bip->bli_refcount) > 0);476 ASSERT(bip->bli_flags & XFS_BLI_HOLD);477 478 bip->bli_flags &= ~XFS_BLI_HOLD;479 trace_xfs_trans_bhold_release(bip);480}481 482/*483 * Mark a buffer dirty in the transaction.484 */485void486xfs_trans_dirty_buf(487 struct xfs_trans *tp,488 struct xfs_buf *bp)489{490 struct xfs_buf_log_item *bip = bp->b_log_item;491 492 ASSERT(bp->b_transp == tp);493 ASSERT(bip != NULL);494 495 /*496 * Mark the buffer as needing to be written out eventually,497 * and set its iodone function to remove the buffer's buf log498 * item from the AIL and free it when the buffer is flushed499 * to disk.500 */501 bp->b_flags |= XBF_DONE;502 503 ASSERT(atomic_read(&bip->bli_refcount) > 0);504 505 /*506 * If we invalidated the buffer within this transaction, then507 * cancel the invalidation now that we're dirtying the buffer508 * again. There are no races with the code in xfs_buf_item_unpin(),509 * because we have a reference to the buffer this entire time.510 */511 if (bip->bli_flags & XFS_BLI_STALE) {512 bip->bli_flags &= ~XFS_BLI_STALE;513 ASSERT(bp->b_flags & XBF_STALE);514 bp->b_flags &= ~XBF_STALE;515 bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL;516 }517 bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;518 519 tp->t_flags |= XFS_TRANS_DIRTY;520 set_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);521}522 523/*524 * This is called to mark bytes first through last inclusive of the given525 * buffer as needing to be logged when the transaction is committed.526 * The buffer must already be associated with the given transaction.527 *528 * First and last are numbers relative to the beginning of this buffer,529 * so the first byte in the buffer is numbered 0 regardless of the530 * value of b_blkno.531 */532void533xfs_trans_log_buf(534 struct xfs_trans *tp,535 struct xfs_buf *bp,536 uint first,537 uint last)538{539 struct xfs_buf_log_item *bip = bp->b_log_item;540 541 ASSERT(first <= last && last < BBTOB(bp->b_length));542 ASSERT(!(bip->bli_flags & XFS_BLI_ORDERED));543 544 xfs_trans_dirty_buf(tp, bp);545 546 trace_xfs_trans_log_buf(bip);547 xfs_buf_item_log(bip, first, last);548}549 550 551/*552 * Invalidate a buffer that is being used within a transaction.553 *554 * Typically this is because the blocks in the buffer are being freed, so we555 * need to prevent it from being written out when we're done. Allowing it556 * to be written again might overwrite data in the free blocks if they are557 * reallocated to a file.558 *559 * We prevent the buffer from being written out by marking it stale. We can't560 * get rid of the buf log item at this point because the buffer may still be561 * pinned by another transaction. If that is the case, then we'll wait until562 * the buffer is committed to disk for the last time (we can tell by the ref563 * count) and free it in xfs_buf_item_unpin(). Until that happens we will564 * keep the buffer locked so that the buffer and buf log item are not reused.565 *566 * We also set the XFS_BLF_CANCEL flag in the buf log format structure and log567 * the buf item. This will be used at recovery time to determine that copies568 * of the buffer in the log before this should not be replayed.569 *570 * We mark the item descriptor and the transaction dirty so that we'll hold571 * the buffer until after the commit.572 *573 * Since we're invalidating the buffer, we also clear the state about which574 * parts of the buffer have been logged. We also clear the flag indicating575 * that this is an inode buffer since the data in the buffer will no longer576 * be valid.577 *578 * We set the stale bit in the buffer as well since we're getting rid of it.579 */580void581xfs_trans_binval(582 xfs_trans_t *tp,583 struct xfs_buf *bp)584{585 struct xfs_buf_log_item *bip = bp->b_log_item;586 int i;587 588 ASSERT(bp->b_transp == tp);589 ASSERT(bip != NULL);590 ASSERT(atomic_read(&bip->bli_refcount) > 0);591 592 trace_xfs_trans_binval(bip);593 594 if (bip->bli_flags & XFS_BLI_STALE) {595 /*596 * If the buffer is already invalidated, then597 * just return.598 */599 ASSERT(bp->b_flags & XBF_STALE);600 ASSERT(!(bip->bli_flags & (XFS_BLI_LOGGED | XFS_BLI_DIRTY)));601 ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF));602 ASSERT(!(bip->__bli_format.blf_flags & XFS_BLFT_MASK));603 ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);604 ASSERT(test_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags));605 ASSERT(tp->t_flags & XFS_TRANS_DIRTY);606 return;607 }608 609 xfs_buf_stale(bp);610 611 bip->bli_flags |= XFS_BLI_STALE;612 bip->bli_flags &= ~(XFS_BLI_INODE_BUF | XFS_BLI_LOGGED | XFS_BLI_DIRTY);613 bip->__bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;614 bip->__bli_format.blf_flags |= XFS_BLF_CANCEL;615 bip->__bli_format.blf_flags &= ~XFS_BLFT_MASK;616 for (i = 0; i < bip->bli_format_count; i++) {617 memset(bip->bli_formats[i].blf_data_map, 0,618 (bip->bli_formats[i].blf_map_size * sizeof(uint)));619 }620 set_bit(XFS_LI_DIRTY, &bip->bli_item.li_flags);621 tp->t_flags |= XFS_TRANS_DIRTY;622}623 624/*625 * This call is used to indicate that the buffer contains on-disk inodes which626 * must be handled specially during recovery. They require special handling627 * because only the di_next_unlinked from the inodes in the buffer should be628 * recovered. The rest of the data in the buffer is logged via the inodes629 * themselves.630 *631 * All we do is set the XFS_BLI_INODE_BUF flag in the items flags so it can be632 * transferred to the buffer's log format structure so that we'll know what to633 * do at recovery time.634 */635void636xfs_trans_inode_buf(637 xfs_trans_t *tp,638 struct xfs_buf *bp)639{640 struct xfs_buf_log_item *bip = bp->b_log_item;641 642 ASSERT(bp->b_transp == tp);643 ASSERT(bip != NULL);644 ASSERT(atomic_read(&bip->bli_refcount) > 0);645 646 bip->bli_flags |= XFS_BLI_INODE_BUF;647 bp->b_flags |= _XBF_INODES;648 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);649}650 651/*652 * This call is used to indicate that the buffer is going to653 * be staled and was an inode buffer. This means it gets654 * special processing during unpin - where any inodes655 * associated with the buffer should be removed from ail.656 * There is also special processing during recovery,657 * any replay of the inodes in the buffer needs to be658 * prevented as the buffer may have been reused.659 */660void661xfs_trans_stale_inode_buf(662 xfs_trans_t *tp,663 struct xfs_buf *bp)664{665 struct xfs_buf_log_item *bip = bp->b_log_item;666 667 ASSERT(bp->b_transp == tp);668 ASSERT(bip != NULL);669 ASSERT(atomic_read(&bip->bli_refcount) > 0);670 671 bip->bli_flags |= XFS_BLI_STALE_INODE;672 bp->b_flags |= _XBF_INODES;673 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);674}675 676/*677 * Mark the buffer as being one which contains newly allocated678 * inodes. We need to make sure that even if this buffer is679 * relogged as an 'inode buf' we still recover all of the inode680 * images in the face of a crash. This works in coordination with681 * xfs_buf_item_committed() to ensure that the buffer remains in the682 * AIL at its original location even after it has been relogged.683 */684/* ARGSUSED */685void686xfs_trans_inode_alloc_buf(687 xfs_trans_t *tp,688 struct xfs_buf *bp)689{690 struct xfs_buf_log_item *bip = bp->b_log_item;691 692 ASSERT(bp->b_transp == tp);693 ASSERT(bip != NULL);694 ASSERT(atomic_read(&bip->bli_refcount) > 0);695 696 bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;697 bp->b_flags |= _XBF_INODES;698 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);699}700 701/*702 * Mark the buffer as ordered for this transaction. This means that the contents703 * of the buffer are not recorded in the transaction but it is tracked in the704 * AIL as though it was. This allows us to record logical changes in705 * transactions rather than the physical changes we make to the buffer without706 * changing writeback ordering constraints of metadata buffers.707 */708bool709xfs_trans_ordered_buf(710 struct xfs_trans *tp,711 struct xfs_buf *bp)712{713 struct xfs_buf_log_item *bip = bp->b_log_item;714 715 ASSERT(bp->b_transp == tp);716 ASSERT(bip != NULL);717 ASSERT(atomic_read(&bip->bli_refcount) > 0);718 719 if (xfs_buf_item_dirty_format(bip))720 return false;721 722 bip->bli_flags |= XFS_BLI_ORDERED;723 trace_xfs_buf_item_ordered(bip);724 725 /*726 * We don't log a dirty range of an ordered buffer but it still needs727 * to be marked dirty and that it has been logged.728 */729 xfs_trans_dirty_buf(tp, bp);730 return true;731}732 733/*734 * Set the type of the buffer for log recovery so that it can correctly identify735 * and hence attach the correct buffer ops to the buffer after replay.736 */737void738xfs_trans_buf_set_type(739 struct xfs_trans *tp,740 struct xfs_buf *bp,741 enum xfs_blft type)742{743 struct xfs_buf_log_item *bip = bp->b_log_item;744 745 if (!tp)746 return;747 748 ASSERT(bp->b_transp == tp);749 ASSERT(bip != NULL);750 ASSERT(atomic_read(&bip->bli_refcount) > 0);751 752 xfs_blft_to_flags(&bip->__bli_format, type);753}754 755void756xfs_trans_buf_copy_type(757 struct xfs_buf *dst_bp,758 struct xfs_buf *src_bp)759{760 struct xfs_buf_log_item *sbip = src_bp->b_log_item;761 struct xfs_buf_log_item *dbip = dst_bp->b_log_item;762 enum xfs_blft type;763 764 type = xfs_blft_from_flags(&sbip->__bli_format);765 xfs_blft_to_flags(&dbip->__bli_format, type);766}767 768/*769 * Similar to xfs_trans_inode_buf(), this marks the buffer as a cluster of770 * dquots. However, unlike in inode buffer recovery, dquot buffers get771 * recovered in their entirety. (Hence, no XFS_BLI_DQUOT_ALLOC_BUF flag).772 * The only thing that makes dquot buffers different from regular773 * buffers is that we must not replay dquot bufs when recovering774 * if a _corresponding_ quotaoff has happened. We also have to distinguish775 * between usr dquot bufs and grp dquot bufs, because usr and grp quotas776 * can be turned off independently.777 */778/* ARGSUSED */779void780xfs_trans_dquot_buf(781 xfs_trans_t *tp,782 struct xfs_buf *bp,783 uint type)784{785 struct xfs_buf_log_item *bip = bp->b_log_item;786 787 ASSERT(type == XFS_BLF_UDQUOT_BUF ||788 type == XFS_BLF_PDQUOT_BUF ||789 type == XFS_BLF_GDQUOT_BUF);790 791 bip->__bli_format.blf_flags |= type;792 793 switch (type) {794 case XFS_BLF_UDQUOT_BUF:795 type = XFS_BLFT_UDQUOT_BUF;796 break;797 case XFS_BLF_PDQUOT_BUF:798 type = XFS_BLFT_PDQUOT_BUF;799 break;800 case XFS_BLF_GDQUOT_BUF:801 type = XFS_BLFT_GDQUOT_BUF;802 break;803 default:804 type = XFS_BLFT_UNKNOWN_BUF;805 break;806 }807 808 bp->b_flags |= _XBF_DQUOTS;809 xfs_trans_buf_set_type(tp, bp, type);810}811